So I'm looking to compley overhaul my 03' I'm going to put a high performance cam on it, bore it over 50/1000," put an off road chip on it, and throw some high performance headers on it. I'm also gonna lift it 7 inches and roll 37's on 20" rims. So with all these mods, I'll need a tranny that will survive, and be able to meet the demand without breaking a sweat, I know I need money, duh, it Idk what the best tranny is for the job, do I go aftermarket and order one online? Or do I rebuild with performance mods? If so, what do I need?

 

Also, it's a 4x4 with over a quarter million original miles

 

Welcome back to DF. Will move you to the correct section.

For future reference:
https://dodgeforum.com/forum/dodge-r...ead-first.html

 

What engine?

 

With 37" tire's regearing is probably the best way to prolong life of trans, no matter what trans is in there.

Dave

 

How is '03 a 2nd Gen? (besides the 2500/3500)

 

It isn't. Even the 2500/3500s were the new body style in 03.

But, if he still has a 5.9, 46RE trans, this is probably the best forum to be in.

 

That is true.

How long did the 5.9/46RE combo stay around?

Didn't the '02 5.9s have a new transmission, or was that still the 46RE?

 

New trans won't even bolt to the 5.9, No idea when the hemi replaced the magnum motors, but, it was right around in that time frame.

 

Ah, I should have figured that.

Not sure exactly when but the '03 got the Hemi....